<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <title>Document</title>
    <script type="text/javascript" src="./lib/vue-2.4.0.js"></script>
  </head>
  <body>
    <div id="app">
      <a href="" @click.prevent="flag=true">登陆</a>
      <a href="" @click.prevent="flag=false">注册</a>
      <login v-if="flag"></login>
      <register v-else="flag"></register>
    </div>

    <script type="text/javascript">
      Vue.component("login", {
        template: "<h1>登陆组件</h1>"
      });

      Vue.component("register", {
        template: "<h1>注册组件</h1>"
      });

      // 创建 Vue实例，得到 ViewModel
      var vm = new Vue({
        el: "#app",
        data: {
          flag: true
        },
        methods: {}
      });
    </script>
  </body>
</html>
